80KSBR200 Datasheet, PDF (91/172 Pages) Integrated Device Technology – sRIO SERIAL BUFFER FLOW-CONTROL DEVICE

IDT 80KSBR200
Notes
8.2.5 Lost Packet Replacement Register
Name: LOST_PKT_REP_REG Address: 0x18030
Advanced Datasheet*
Bit
0
31:1
Note:
0)
Field Name
REP_LOST_PKT
-
Type
Reset
Value
Comment
RW
1b0
0
Queue 0 Replace Lost Packets:
0 = No, 1 = Yes
Reserved
Table 55 Lost Packet Replacement Register
If a single packet is lost, it will be replaced by a dummy packet to avoid breaking the memory addresses.
If more than one packet is lost, an error will be generated instead of replacing. If this bit is set to 0, the lost
packet is ignored.
8.2.6 Source and Destination IDs
The sRIO source and destination IDs must be programmed to access the queue. These registers are read/write from
any of the access ports. sRIO may program these registers using the overall device destination ID, since direct sRIO
access to the queue may otherwise not be available. In addition, a queue input or output may be programmed with either
an 8 or 16 bit destination ID.
Name: SRC_DEST_ID_REG
Address: 0x18034
Bit
Field Name
Type
Reset
Value
Comment
7:0
SRC_ID_8
15:8 SRC_ID_16
23:16 DEST_ID_8
RW
8h0
RW
8h0
RW
8h0
Source ID is 8 bits:
Defaults to base queue number
Source ID is 16 bits:
Defaults to zero
Destination ID is 8 bits:
Defaults to base queue number
31:24 DEST_ID_16
RW
8h0
Destination ID is 16 bits:
Defaults to zero
Note:
7:0)
15:8)
23:16)
31:24)
Table 56 Source and Destination ID Register
This is the queue source ID for sRIO protocol.
This is the 16 bit extension for sRIO. These bits will be compared if the queue input is enabled for 16 bits.
This is the queue destination ID for sRIO.
This is the 16 bit extension for sRIO on the destination ID. These bits will be appended to the sRIO
header if the queue output is enabled for 16 bits.
8.2.7 Program Almost Empty / Almost Full Register
The PAE and PAF flags are each eight bits long for each of the queues. The eight bits allow the flags to be placed
anywhere with an accuracy of 1/256^th of the total queue size. Since the queue size is programmable, PAF and PAE are
proportional indications and not accurate size counts. The PAE flag is the distance from empty and the PAF flag is the
distance from Full. Both may be placed anywhere in the memory, but cannot overlap to where PAF + PAE > 0FFh.
These registers may be read or written from any of the sources.
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March 19, 2007
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